This info comes from the latest MINI PR release:
Finished with top-quality materials and the most refined surfaces, the interior of the new MINI Cabrio comes in three different colors: Blue, Beige, and Black. The dashboard and parts of the door linings are available in Silver, Anthracite, and with wood and aluminium-style trim.
Moving on to the seat upholstery, a choice of 3 different cloth covers, 3 combinations of cloth and leather, as well as three leather options in various colour combinations offer a broad margin for individual wishes and preferences.
Like the exterior, the interior is also available as an option with an attractive Chrome Package, trim in high-gloss chrome comprising features such as the rev counter surrounds, the surrounds on the central instruments and the cupholders accentuating the classic character of the car.
The Cockpit Chrono Package also available as an option emphasizes the sporting and elegant ambience within the MINI Convertible: In this case the central instrument features two circular dials presenting the level of fuel in the tank, oil and coolant temperature, as well as oil pressure. The speedometer is moved next to the rev counter on the steering column, the particular feeling of sports motoring being further accentuated in this case by the optional three-spoke leather sports steering wheel.
Be rest assured that those of the us in the United States won't see the leather/cloth combo. That being said the real interesting bit of info here is the “aluminum trim” which sounds as if it may be a new and previously unseen option.
A couple other additions to the interior that weren't mentioned in the official press release are the added storage areas. There's one below the row of toggle switches and another just below the handle of the parking brake. Look for more info in the coming days and weeks about these details.